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Change the autovacuum launcher to read pg_database directly, rather than

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via the "flat files" facility.  This requires making it enough like a backend
to be able to run transactions; it's no longer an "auxiliary process" but
more like the autovacuum worker processes.  Also, its signal handling has
to be brought into line with backends/workers.  In particular, since it
now has to handle procsignal.c processing, the special autovac-launcher-only
signal conditions are moved to SIGUSR2.

Alvaro, with some cleanup from Tom
This commit is contained in:
Tom Lane
2009-08-31 19:41:00 +00:00
parent 25ec228ef7
commit 00e6a16d01
8 changed files with 140 additions and 141 deletions
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6
src/backend/postmaster/postmaster.c
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@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.593 2009/08/29 19:26:51 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.594 2009/08/31 19:41:00 tgl Exp $
*
* NOTES
*
@ -1442,7 +1442,7 @@ ServerLoop(void)
{
avlauncher_needs_signal = false;
if (AutoVacPID != 0)
kill(AutoVacPID, SIGUSR1);
kill(AutoVacPID, SIGUSR2);
}
/*
@ -3865,7 +3865,7 @@ SubPostmasterMain(int argc, char *argv[])
InitShmemAccess(UsedShmemSegAddr);
/* Need a PGPROC to run CreateSharedMemoryAndSemaphores */
InitAuxiliaryProcess();
InitProcess();
/* Attach process to shared data structures */
CreateSharedMemoryAndSemaphores(false, 0);